Carburetor



Patented Aug. 10, 1926.

UNITED -STATES 1559 561 9 'PAT'EENTOFFICE@ ROLLAN'D R. CHECK, OF BRADFORD, PENIN'SYLVANIA, AN!) CHARLES S. ALT, OF BUFFALO, NEW YORK, ASSIGNORS T BUFFALO GASOLENE MOTOR OOMPANY,

A CORPORATIOIT OF NEW YORK.

CARBURETOR.

Application filed November 29, l9 24. Seria1 N0. 752,967.

This inv; ention relate s t0 a carburetoi und.

- has theobject 130 provide in connection with a carburetor means for 'permitting the' use.

of natura l gas 01 manufactured gas Wih 01 W1thou the use ofgasolme thereby render- 1ngit poss1ble to use whatever fuel 1s avzulable without requiring' any change in tlie a llaterally ext:&nding -air iinlet 13 containing aifibuttperfly val;ve 514. "Beisween :its inlet and nutlet ;tihe niixing :chanuber i s ;provided Wl'ilh :a slarg e Venturi .tube 15 iih.e bore =Qf which 'eflares 1up;wardly ai-I1Cl arran'ged a;xially Wltllin the mixing chamber and the lower;;pzurt of the large Venturi tube is a SII12L1l Vertical- ..V.eni:-urii tube 1'6'W11i6111 pens at its upper end end is open and adapted to communicate with a gas supply and its side is provided with a plurality of liquid fuel supply openings 17. The small Venturi tube is supported from the adjacent Wall 0f the mixing charnber by an arm 18 and its liquid fuel openings are connected with the supply chamber 19 of a gasolene o1 similar liquid fuel supply device by Ineans of a conduit 20 extending through the arm .18 and the Walls of the mixing liquid-fuel supply chamber and containing. a regulating valve 2-1. The liquid level may be maintained at the proper height in the liquid fuel supply cha1nbei by a valve 22 controlling the inlet 23 0f the liquid supply chamber und a float 24 arranged Within the liquid fuel supply 01mmber and connected with the valve 22.

Our improvernents which are associated with an ordinary carburetor, of Wliich ehe foregoing description is merely an example, may loe embodied in various foi1ns, filmt shown in the drawings being satisfactory and constructed as followsz into .the .lar'ge. Ve1iturfi tube while its lower Thenumeral 25 repres ents a gas supply tube w hereby eiher natural 0r manufactured gas is supplied t0 the small Venturi tubewso that tl1e-0arburetor can be used eitlier With a liquid ifuel, 01 a gaseous fuel 01 a combination 0f these' fuels. This gas sup ply tube is arranged vertically in i:he

lower pzut 0f -tl1e mixing chamberand -ex i:ends through the lowerside thereof so that its uppar end is arranged close 130 the lower fand 0f the small Venturi tube und comnnunicates therewith laut still leaves the lower jend of tl1e Venturi in communication with the ai1 inlet 13, While the lower end of the gas supgly tube projects ;to Ehe exterior of ihe mixing cha1nber. Tlne gas supplied to this g2is tube is directed to the lowerend 0f the small V enturi fubeand as it issues f101n fthe latter imixes With Ehe air entering -throu;gh the inlet l;3 und forrns a combustibl e mixure therewith in the large Venturi taube which is dischargedtherefrom through the outlet 131 .tothe plane 0f consumption.

At thistirne the valve 21 may be closed so filmt i;he carburetor only 1nixes air und If desired tl1e valve2-lmay be opened while "=gaS' is.beingsuppliedlto thepipe -25 in which Gase both ga s und ;gasolene 0r other liquid f'iil ar e' mixed :simultaneously wit-h uir preparatory t0 CQn suming the mixture in a gas engine 01 elsewhere.

In order to permit 0f -either cutting ofl the supply of gas through the gas supply tube 25 01 regulat1ng the fiow 0f gas through the same a valve device is provided which in its prefered forma is constructed as follows:

The nurnemls 26 27 represent tl1e upper und lower sections 0'f a valve casing, the upper section being connected With the lower end of the gas supply pipe 01 tube 25 und the lower section being provided with a laterally proj-ecting inlet nipple 28 which receives a supply oi: natural or artificial gas iiom any available source. Between the upper and lower sections of the gas controlling valve casing the same is provided with a partition 29 having an upwardly flaring valve seat 30. A downwardly tapering valve plug 31 is arranged in the valve casing and movable axially toward 2L11d. from the valve seat 80 so as to either engage tha same for closing this valve 01 t0 be arranged in a n101e 01 less open osition, depending upon the conditions under which the carburetor is usacl. In its preferrecl f0rn1 tl1e 1neans f01 acljusting tl1e plug of the gas controlling valve comprises a valve stem 82 proje'cting from tl1e small encl 0f tl1e gas valve plng 31 clownwarclly through the 10W01 si(le of ehe, gas valve casing, an adjusting screw nut 83 arrangecl on alle lower encl 01" this Stem ancl aclaptecl t0 engage the unclersicle of the gas valve casing for limiting tl1e lifting action'of tl1e gas valve plug anal a 10011 nut 34: also arrangecl 011 this stem and engaging with the underside 0f tne aaljusting screw nut. The osition of tl1e valve plug 31 relatively to the valve seat 80 is acljustecl for regulating the supply of gas tl1rough this valve by means 0f a vertical acljnsing screw 35 engaging Wioh the loWe1 end of the valve sten1 32 ancl working in a support 36 clepencling fr0m the Valve casing und a cla1nping nut 37 arrangecl 0n saicl acljn'sting screw and engaging with the lower en :l 0f said supportas shown in Figure l.

VVhen the gas supply clevice is nsecl 'the acljusting screw is turned up so tl1at ehe valve is sligl1tly nnseated. ancl permits the desirecl amount of gas to pass the valve plug t0 the carburetor, but when this valve is not usecl the screw may be turnecl so as to pernnit the valve plug 31 to close entirely. If the suct'1on on the outlet of the carburetor lifts the val.ve plug 81 th-e latter is prevented from being raisecl uncluly ancl closing ehe outlet of the gas valve casing by engagement of the stop screw 33 with the undersicle of Ehe valve casing beforethe plug 31 strikes 0f this casing.

thus combining with tl1e usual car- 7 buretor f0r liquid fuels a device which also permits gaseous fuels to be used in the same carburetor, 113 1s poss1ble t0 use the same carburetor either with a aseous fuel o1 a 28 is aroviclecl Wih a valve of an suitable 1 construction ancl when this valve is closecl any lifting eflect wl1ich is exrtecl 011 the conical valve 31 clue to suction in tl1'e tnbe 15 is iclle ancl Will not procluce any results.

V'Ve claim as our inventionz A carburetor'having a gas supply Pipe, a

valve casing pTovidecl at one encl with an outlt communicating with saicl gas supply pipe, at its sicle with a gas inlet ancl between its inlet anal outlet with an upwarclly flaring conical valve seat, a conical valve plug a1- rangecl within the valve casing and movable axially towarcl and from said valve seat forcontrolling tl1e fiow of gas theretl1rough, a valve, stern extencling from the lower small encl of sa'1cl conical valve plug downwarclly tl1rough the lower encl of said valve Casing, a screw nut arrangecl on tl1e lower end of saicl valve Stern ancl aclapted 130 engage the undersicle ofsaicl valve casing, a support arrangecl on ehe lower Part 0f saicl valve casing, and an acljusting-screw arranged on said support ancladapt6d to be engaged by tl1e lower encl of said valve stem for arresting the outward mowfement 0f the conical valve ab a predetermined distance from its seat.

HOLLAND R. HECK.

CHARLES S. ALT. 

